export default (target) =>{
    target.prototype.plus = function (a,b){
        return a + b
    }

    target.prototype.minus = function (a,b){
        return a - b
    }

    target.prototype.mul = function (a,b){
        return a * b
    }
    
    target.prototype.div = function (a,b){
        return a / b
    }
}